<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<style>
  *{
      padding: 0;
      margin: 0;
  }
  body{
      width: 100vw;
      height: 100vh;
      overflow-x: hidden;
  }
    .box{
        box-sizing: content-box;
        width: 100%;
        height: 100%;
    }
    .orange{
        background-color: orange;
    }
    .grey{
        background-color: grey;
    }
    .green{
        background-color: green;
    }
    .pink{
        background-color: purple;
    }
    .blue{
        background-color: blue;
    }
</style>
<body>
    <div class="box green"></div>
    <div class="box pink"></div>
    <div class="box grey"></div>
    <div class="box orange"></div>
    <div class="box blue"></div>
</body>
<script>
</script>
</html>